Improvement in apparatus for finishing terrets



diluted gratta CONSTANTINE HINGHER., OF NEW BRUNSWICK, NEW JERSEY.

Letters Patent No. 108,139, dated October 11, 1870.

IMPROVEMENT IN APPARATUS FOR FlNlSHING TERRETS.

The Schedule referred to in these Letters Patent and making part of thesame exact description thereof, which will enable others,`

skilled in the art to make and use the same, reference heilig had to theaccompanying drawing forming part of this specification.

This inrention relates to improvements in'apparatus for tinishingterrets, rings, and other similar articles used in making harness, whichhave been covered with vulcanized India rubber, and which cannot beturned by a lathe having a continuous rotary motion, owing toprojections on thc rings.

The invention consists in a stock receiving the ring of thc terret on aboss, so that one can be held while the other is turned, said stockcarryinga dressing-tool and a feed-screw, also an operating lever forholding and turning it, all as hereinafter described. l

Figure 1 is view of my improved-tool partly in section and partly inelevation; it also-shows a section of a terret in the position for beingdressed;

Figure 2 is a bottom view of' lig. l; and- Figure 3 vis au elevation,showing a slight modilication in the construction ot' the same.

Similar letters of reference indicate corresponding parts.

Owing to the difficulty 0i' turning and dressing these articles in alathe having continuous motion, on account of the projecting Shanks, theoperation has hitherto been done by ahand-polishingor finishing-tool,which is slow and tedious, and which it is the object of this inventionto obviate.

l A is a cylindiica-l stock, of wood, metal, or other suitablesubstances, o f suitable length, and somewhat larger than the ring otthe tcrret to be dressed. It is provided at one end with a boss, B, ofthe proper size to enter the ring snugly, and receive it against ashoulder, c, and below this boss is a feed-screw, D, which may eitherproject from it and have a screwthread for the reception of afeeding-nut, D., or it may be tapped, and have the feed-screw providedwith a head or collar, E, screw into it, as shown in fig. 3, in whichcase the stock will serve as thc nut.

The cylinder is provided, at one side, ywith an oblique sl'ot or groove,for holding a tool, F, for working upon thc upper side of thc terret,which tool is conned in the slot, either by the screw G in the stud H,projecting radially from the cylinder, or it may be by screws I passingthrough a rib, K, projecting from the side of the cylinder, betweenwhich and another rib, the slot for the terrct is formed.

L is awaslier introduced between the'nut D and' the terret.

M is a lever, passsing through a hole iu the stock -nearthc top forholding and turning it.

The operation is as follows:

The nut D' or the head F of the screw, represented in tig. 3, as thecase may be, is screwed up in a vice or any other suitable means ofholding.,r it. The rimN of the terret is placed on the -boss 'B of thestock, which is thenV screwed into the nut D', or on the screw, untilthe ring is forced up nearly to the shoul der c, either by the washer E,or the collari of the nut, when it is pressed against the edge of thetool F, which is shaped to correspond with the finished form or" oneside of the ring. In adjusting the'terret, care is taken that the shankO of the terret shall be as close against the heel of the cutter as maybe; then, the stock being held against turning by the lever, the terretis turned by the hand, or other means, applied to the shank O, untilitis brought around against the edge of the cutter; this causes ascraping or turning ofi' a thin cut; theterret is then turned back tothe original position, and the tool is fed for a new cnt by moving thelever M in the direction to screw the stock down into the nut D', orupon the screw, after which another cutis taken, as before, and so onuntil completed. The tei-ret is then taken oi', turned the other sideup, and the operation proceeded with as before..

It is obvious that the stock and feeding-screw may be variouslyarranged,and that instead of holding the nut or feeding-screw in thevise or -other holder, the same purpose may be accomplished by holdingthe stock.

Having thus described my invention,

I claim as new and desire to secure by Letters Patent- 'lhe grooved,bossed, and shouldered stoel; A B C, feed-screw D, lint and collar D E,and tool F, combined and applied as and for the purpose described.

' GONSTANTINE HINGHER.

Witnesses GEO. W.,MABEE, T. B. Mosman.

